Open/close valve



FIG. 1 is a perspective view of an open/close valve:

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a cross-section view thereof, taken along line 7-7 of FIG. 5.

The broken lines depict environmental subject matter only and form nopart of the claimed design.

The ornamental design for an open/close valve, as shown and described.